1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * Copyright (C) 1992, 1993, 1994, 1995
10 * Remy Card (card@masi.ibp.fr)
11 * Laboratoire MASI - Institut Blaise Pascal
12 * Universite Pierre et Marie Curie (Paris VI)
16 * linux/fs/minix/file.c
18 * Copyright (C) 1991, 1992 Linus Torvalds
20 * ext2 fs regular file handling primitives
22 * 64-bit file support on 64-bit platforms by Jakub Jelinek
23 * (jj@sunsite.ms.mff.cuni.cz)
26 #define DEBUG_SUBSYSTEM S_LLITE
28 #include <linux/lustre_dlm.h>
29 #include <linux/lustre_lite.h>
31 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc);
32 extern int ll_setattr(struct dentry *de, struct iattr *attr);
34 static int ll_file_open(struct inode *inode, struct file *file)
37 struct ptlrpc_request *req = NULL;
38 struct ll_file_data *fd;
39 struct obdo *oa = NULL;
40 struct ll_sb_info *sbi = ll_i2sbi(inode);
41 struct ll_inode_info *lli = ll_i2info(inode);
44 if (file->private_data)
47 /* delayed create of object (intent created inode) */
48 /* XXX object needs to be cleaned up if mdc_open fails */
49 /* XXX error handling appropriate here? */
50 if (lli->lli_obdo == NULL) {
51 struct inode * inode = file->f_dentry->d_inode;
53 oa = lli->lli_obdo = obdo_alloc();
54 oa->o_valid = OBD_MD_FLMODE;
55 oa->o_mode = S_IFREG | 0600;
56 rc = obd_create(ll_i2obdconn(inode), oa);
59 lli->lli_flags &= ~OBD_FL_CREATEONOPEN;
62 fd = kmem_cache_alloc(ll_file_data_slab, SLAB_KERNEL);
64 GOTO(out, rc = -ENOMEM);
65 memset(fd, 0, sizeof(*fd));
67 rc = mdc_open(&sbi->ll_mdc_conn, inode->i_ino, S_IFREG, file->f_flags,
68 oa, (__u64)(unsigned long)file, &fd->fd_mdshandle, &req);
70 ptlrpc_req_finished(req);
72 GOTO(out_req, -abs(rc));
73 if (!fd->fd_mdshandle) {
74 CERROR("mdc_open didn't assign fd_mdshandle\n");
75 /* XXX handle this how, abort or is it non-fatal? */
77 if (!fd->fd_mdshandle)
78 CERROR("mdc_open didn't assign fd_mdshandle\n");
83 GOTO(out_mdc, rc = -EINVAL);
86 rc = obd_open(ll_i2obdconn(inode), oa);
88 GOTO(out_mdc, rc = -abs(rc));
90 file->private_data = fd;
96 mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
97 S_IFREG, fd->fd_mdshandle, &req);
101 kmem_cache_free(ll_file_data_slab, fd);
102 file->private_data = NULL;
107 static int ll_file_release(struct inode *inode, struct file *file)
110 struct ptlrpc_request *req = NULL;
111 struct ll_file_data *fd;
113 struct ll_sb_info *sbi = ll_i2sbi(inode);
117 fd = (struct ll_file_data *)file->private_data;
118 if (!fd || !fd->fd_mdshandle) {
120 GOTO(out, rc = -EINVAL);
123 oa = ll_i2info(inode)->lli_obdo;
126 GOTO(out_fd, rc = -ENOENT);
128 rc = obd_close(ll_i2obdconn(inode), oa);
130 GOTO(out_fd, abs(rc));
132 if (file->f_mode & FMODE_WRITE) {
134 attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME | ATTR_SIZE;
135 attr.ia_mtime = inode->i_mtime;
136 attr.ia_ctime = inode->i_ctime;
137 attr.ia_atime = inode->i_atime;
138 attr.ia_size = inode->i_size;
140 /* XXX: this introduces a small race that we should evaluate */
141 rc = ll_inode_setattr(inode, &attr, 0);
143 CERROR("failed - %d.\n", rc);
144 rc = -EIO; /* XXX - GOTO(out)? -phil */
148 rc = mdc_close(&sbi->ll_mdc_conn, inode->i_ino,
149 S_IFREG, fd->fd_mdshandle, &req);
150 ptlrpc_req_finished(req);
156 ptlrpc_free_req(fd->fd_req);
161 kmem_cache_free(ll_file_data_slab, fd);
162 file->private_data = NULL;
168 static inline void ll_remove_suid(struct inode *inode)
172 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
173 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
175 /* was any of the uid bits set? */
176 mode &= inode->i_mode;
177 if (mode && !capable(CAP_FSETID)) {
178 inode->i_mode &= ~mode;
179 // XXX careful here - we cannot change the size
183 static void ll_update_atime(struct inode *inode)
187 attr.ia_atime = CURRENT_TIME;
188 attr.ia_valid = ATTR_ATIME;
190 if (inode->i_atime == attr.ia_atime) return;
191 if (IS_RDONLY(inode)) return;
192 if (IS_NOATIME(inode)) return;
194 /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
195 ll_inode_setattr(inode, &attr, 0);
198 static int ll_lock_callback(struct ldlm_lock *lock, struct ldlm_lock *new,
199 void *data, __u32 data_len,
200 struct ptlrpc_request **reqp)
202 struct inode *inode = lock->l_data;
206 /* Completion AST. Do nothing. */
210 if (data_len != sizeof(struct inode))
213 /* FIXME: do something better than throwing away everything */
217 CDEBUG(D_INODE, "invalidating obdo/inode %ld\n", inode->i_ino);
218 invalidate_inode_pages(inode);
221 if (ldlm_cli_cancel(lock->l_client, lock) < 0)
226 static ssize_t ll_file_read(struct file *filp, char *buf, size_t count,
229 struct ll_file_data *fd = (struct ll_file_data *)filp->private_data;
230 struct inode *inode = filp->f_dentry->d_inode;
231 struct ll_sb_info *sbi = ll_i2sbi(inode);
232 struct ldlm_extent extent;
233 struct lustre_handle lockh;
234 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
240 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
241 extent.start = *ppos;
242 extent.end = *ppos + count;
243 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
244 inode->i_ino, extent.start, extent.end);
246 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
247 &extent, sizeof(extent), LCK_PR, &flags,
248 ll_lock_callback, inode, sizeof(*inode),
251 CERROR("lock enqueue: err: %d\n", err);
252 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
255 CDEBUG(D_INFO, "Reading inode %ld, %d bytes, offset %Ld\n",
256 inode->i_ino, count, *ppos);
257 retval = generic_file_read(filp, buf, count, ppos);
260 ll_update_atime(inode);
262 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
263 err = obd_cancel(&sbi->ll_osc_conn, LCK_PR, &lockh);
265 CERROR("lock cancel: err: %d\n", err);
272 * Write to a file (through the page cache).
275 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
277 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
278 struct inode *inode = file->f_dentry->d_inode;
279 struct ll_sb_info *sbi = ll_i2sbi(inode);
280 struct ldlm_extent extent;
281 struct lustre_handle lockh;
282 __u64 res_id[RES_NAME_SIZE] = {inode->i_ino};
288 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
289 /* FIXME: this should check whether O_APPEND is set and adjust
290 * extent.start accordingly */
291 extent.start = *ppos;
292 extent.end = *ppos + count;
293 CDEBUG(D_INFO, "Locking inode %ld, start %Lu end %Lu\n",
294 inode->i_ino, extent.start, extent.end);
296 err = obd_enqueue(&sbi->ll_osc_conn, NULL, res_id, LDLM_EXTENT,
297 &extent, sizeof(extent), LCK_PW, &flags,
298 ll_lock_callback, inode, sizeof(*inode),
301 CERROR("lock enqueue: err: %d\n", err);
302 ldlm_lock_dump((void *)(unsigned long)lockh.addr);
305 CDEBUG(D_INFO, "Writing inode %ld, %ld bytes, offset %Ld\n",
306 inode->i_ino, (long)count, *ppos);
308 retval = generic_file_write(file, buf, count, ppos);
310 if (!(fd->fd_flags & LL_FILE_IGNORE_LOCK)) {
311 err = obd_cancel(&sbi->ll_osc_conn, LCK_PW, &lockh);
313 CERROR("lock cancel: err: %d\n", err);
319 int ll_file_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
322 struct ll_file_data *fd = (struct ll_file_data *)file->private_data;
326 case LL_IOC_GETFLAGS:
327 /* Get the current value of the file flags */
328 return put_user(fd->fd_flags, (int *)arg);
329 case LL_IOC_SETFLAGS:
330 case LL_IOC_CLRFLAGS:
331 /* Set or clear specific file flags */
332 /* XXX This probably needs checks to ensure the flags are
333 * not abused, and to handle any flag side effects.
335 if (get_user(flags, (int *) arg))
338 if (cmd == LL_IOC_SETFLAGS)
339 fd->fd_flags |= flags;
341 fd->fd_flags &= ~flags;
344 /* We need to special case any other ioctls we want to handle,
345 * to send them to the MDS/OST as appropriate and to properly
346 * network encode the arg field.
347 case EXT2_IOC_GETFLAGS:
348 case EXT2_IOC_SETFLAGS:
349 case EXT2_IOC_GETVERSION_OLD:
350 case EXT2_IOC_GETVERSION_NEW:
351 case EXT2_IOC_SETVERSION_OLD:
352 case EXT2_IOC_SETVERSION_NEW:
359 /* XXX this does not need to do anything for data, it _does_ need to
361 int ll_fsync(struct file *file, struct dentry *dentry, int data)
366 struct file_operations ll_file_operations = {
368 write: ll_file_write,
369 ioctl: ll_file_ioctl,
371 release: ll_file_release,
372 mmap: generic_file_mmap,
376 struct inode_operations ll_file_inode_operations = {
377 truncate: ll_truncate,